Device for applying pressure.



W. S. DUWELIUS.

DEVICE EUR APPLYING PRESSURE.

APPLICATION FILED AUG-30,1915.

Patented Jan. 25, 1916.

| Fill A TTOR/VEK THE COLUMBIA PLANOGRAPH co., wASHxNuToN, n. c,

CIJ

WALTER S. DUWELIUS, OF CINCINNATI, OHIO.

' DEVICE FOR APPLYING PRESSURE.

Continuation of application Serial No. 39,511, filed July 12, 1915.

Specification of Letters Patent.

Patented J an. 25, 19H5.

This application filed August 30, 1915.

'serial no. 48,055.

To all whom it may concern:

Be it known that I, lWALTER S. DUWELIUS, a citizen of the United States, residing at Cincinnati, county of Hamilton, and State of Ohio, have invented certain new and useful improvements in Devices for Applying Pressure; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

T his invention relates to devices for applying pressure and is particularly adapted for use in duoins for use in locking forms of tvpe in chases.

lThe features of the invention are of special utility in ouoins of the type illustrated in United States etters Patent No. 1,149,037, granted to me August 3rd, 1915.

A quoin constructed in accordance with the present invention consists of a hollow etallic casing of rectangular cross-section slotted lengthwise thereof along one face, a plurality of contacting devices within the casing, and means for moving the contacting devices lengthwise of the casing, the devices being so constructed that when they vare so moved certain of them are projected more or less through the slotted. opening in the side of the casing.

In accordance with the present invention, the members which are projected through the slots in the casing are in the form of blocks having parallel front and rear faces extending lengthwise of the casing and rounded ends, which ends co-act with rollers lying within the casing. Preferably these curved ends of the blocks are formed on radii which constantly decrease in length as the curve approaches the rear face of the block. By reason of this construction, as the extent of projection of the blocks from the casing increases, the leverage of the parts operating to move the blocks outwardly increases. This permits of exerting an increased pressure at the point in the outward movement of the blocks when such increased pressure is mostrdesired.

rEhe blocks which are adapted to be projected through the opening in the `casing have flanges at their sides adjacent to their rear faces which iianges are adapted to engage walls adjacent to the slot in the casing to prevent the blocks from escaping from the casing. When in their retracted positions,

the blocks have their front faces Hush with the face of the rectangular casing. The blocks are supported in these positions upon a thin metallic strip which is inserted within the casing between the rear faces of the blocks and the opposite wall of the casing. This strip supports the blocks in the proper positions and facilitates the ready assemblage of the parts byy first inserting the blocks, rollers and spacers within the casing and then inserting the strip behind them.

rlhese and other features of the invention will be better understood by reference to the following description taken in connection with the accompanying drawing, which shows the preferred embodiment of the invention.

In the drawing, Figure l is a longitudinal section of my improved form of quoin; Fig. 2 is a top view of the same broken away and sectioned in part; Fig. 3 is a side elevation showing the blocks projected; Fig. 4 is a sectional elevation of a modified form of quoin; and Figs. 5 and 6 are transverse sections showing one of the blocks in its retracted and in its projected positions.

Referring to these drawings, the quoin consists of a tubular frame or casing 7 of rectangular cross-section. On one side this tubular casing is cut away to provide a plurality of slots S, three such slots being shown in the form of quoin illustrated in Figs. 1, 2 and 8. Each of these slots is of a length somewhat greater than the length of the corresponding block and of a width slightly less than the width of the interior of the Vcasing; in this way fianges are provided at the sides of the slots bythe inwardly extending portions of the top wall of the casing.

Within the casing are a plurality of blocks 9, one for each of the slots 8. Each of these blocks is of substantially trapezoidal form in that it has parallel front and rear faces extending lengthwise of the casing and ends formed on curves which approximate lines inclined to the front and rear faces. rIhe formation of the curved ends of the blocks is of importance. Preferably each end of each block is curved and the curve is formed on radii which constantly decrease in length from the front to the rear of the block. The result is that the rear portion of the block is curved on a relatively short radius which serves to increase the leverage obtained in moving the'block outwardly after the block of a block which would involve escape of the block from the casing.

On each side of each of the blocks 9 are rollers 12 within the casing 7. These rollers are of cylindrical form and of a. length equal to the length of lthe opening within the casing. They are, therefore, retained within the casing at all times, and they lcontact with the curved ends of the blocks 9.

I employ spacers 13 within the casing 7, each spacer being located within the portion -of the casing lying between two of the slots S. y

A sheet metal strip 14 of a thickness approximately equal to the thickness of the material employed for the casing 7, is inserted within the casing behind the blocks 9. rollers 12 and spacers 13, that is, between the rear faces of those parts and the adjacent wall of the casing. This strip holds the several blocks 9 normally with their front faces iiush with the front face of the casing, as is shown in Figsl, 4 and so that at the start of the outward movement of the blocks 9 pressure is applied to the adjacent parts with which the quoin is emploved.

The blocks 9 are moved lengthwise of the casing in order to cause them to be projected more or less through the slots in the casing bv means of a screw 15 operable from outside the casing. In Figs. 1, 2 and `3. a single screw is shown at one end only of the casing; in a (moin of substantial length I prefer to employ screws at both ends. The threaded shank 16` of the screw passes through .a threaded opening` in a plug 17 which is secured within the end of the casing 7 and its reduced threaded end enters a. threaded opening in a block 18 of rectangular cross-section movable within the opening in the casing 7. The plug 17 is secured within the endl of the casing 7 by forming depressionsV in the plug and forcing the metal ofthe casing into these depressions. One of the depressions is indicated at 19 in Fig. 2, the depressions ybeing preferably located at the four edges of the rectangular block. In Figs; 3 vand 4 where the end of the Quoin is shown in elevation,.the metal of the casing is shown at 2O as having been forced into the depression 19 in the block 17.

Instead of employing one or two screws located at the ends of the casing as the means for effecting the lengthwise movement of the blocks, I may employ a screw lying within the portion f the casing intermediate its ends and operable from outside the casing through a slot provided therein. Such a construction is shown in Fig. 4 wherein a member having its ends 21 and 22 reversely threaded is located within the casing 7. The central portion 23 of this member is accessible through a cut-away portion of the casing 7 and is provided with holes aadapted to be engaged by a suitable tool to turn the member. The threaded lends 21 and 22 enter threaded openings in blocks 24 which are movable lengthwise-within the Vcasing 7 and which by their movement force the rollers 12 into engagement with the blocks 9 so as to project the latter through the slots 8 Yin the casing 7 In addition to .the blocks 9 and rollers 12,

The quoin thus constructed is adapted to be inserted in a chase with a form of type and the usual furniture, and the screw or 23 is then turned so as to cause lengthwise movement of the blocks 9, rollers 12 and spacers 13 within the casing. As the rollers.12 are pressed in the direction of the length of the casing into engagement with Vthe, ends of the blocks 9` they tend to force the blocks` 9'in a direction at right angles to the length of the casing to project their ends through the slots 8. As the outward movement of the blocks 9 increases, the force tending to move the blocks outward increases by reason of the diminished radius ofthe curvature of the ends of the blocks near the rear faces of the blocks. This facilitates exerting higher pressure at a time when it is needed most, that is, near the conclusion of the outward'movement of the bloclrs 9. Furthermore, the several blocks l9 will move more or less as may be refuiired to eouahze the pressure exerted at different pointsralong the length of the quoin. and if necessary because of ineuualities in the chase or furniture, the several blocks 9 will move uneoually so as to compensate for such inequalities.

l/Vhat I claim is:

1. A device for applying pressure comprising a' hollow .frame-member slotted lengthwise thereof. a plurality of contacting devices arranged in line within' the framemember, and means operable from outside theA frame-member for moving the contacting devices in the direction of the length of the frame-member, certain of said contacting devices being blocks having arallel front and rear faces extending lengthwise of the frame-member and having their ends curved on radii decreasing in length toward the rear faces of the blocks; substantially as described.

2. A device for applying pressure comprising a hollow casing of rectangular crosssection closed at its ends and provided with a plurality of lengthwise slots in its face, a plurality .of blocks in the casing one located at each of the slots and each having parallel front and rear faces extending lengthwise of the casing and the ends of the blocks being so shaped that the blocks are of greater length adjacent to their front faces than adjacent to their rear faces, rollers in the casing engaging the ends of the blocks, spacers movable within the casing and located in the portions thereof lying between said slots, and means operated from outside the casing for applying pressure to the blocks, rollers and spacers in the direction of the length of the casing, substantially as described.

3. A device for applying pressure, comprising a hollow casing of rectangular crosssection closed at its ends and slotted along its face, the width of the slotted opening being less than the width of the interior of the casing, blocks in the casing each having parallel front and rear faces extending lengthwise of the casing and lengthwise flanges located at opposite sides adjacent to the rear face to prevent escape of the block from the casing, the ends of the blocks being so shaped that the blocks are of greater length adjacent to their front faces than adjacent to their rear faces, rollers in the casing co-acting with the ends of the blocks, and means operated from outside the casing for subjecting the blocks and rollers to pressure in the direction of the length of the casing, substantially as described.

(l. A device for applying pressure, comprising a hollow casing of rectangular crosssection closed at its ends and slotted along its face, a plurality of blocks within the casing having parallel front and rear faces and anged to prevent escape of the blocks from the casing, a strip lying within the casing between the rear faces of the blocks and the wall of the casing, means operated from outside the casing for moving the blocks lengthwise of the casing, and means co-acting with the blocks to project them through the slotted opening in the casing when they are so moved; substantially as described.

5. A device for applying pressure, comprising the combination of a hollow casing of rectangular cross-section closed at its ends and provided with a plurality of lengthwise slots in its face, a plurality of blocks in the casing one located at each of the slots and having parallel front and rear faces extending lengthwise of the casing, a strip lying within the casing and adapted to co-act with the rear face of each block to hold the front face of the block Hush with the surface of the casing, means operable from outside the casing for moving the blocks in the direction of the length of the casing, and means actuated by such lengthwise movement of the blocks for projecting the blocks through the slots in the casing; substantially as described.

6. A device for applying pressure comprising a hollow casing of rectangular crosssection closed at its ends and provided with a. plurality of lengthwise slots in its face, each of which slots is of less width than the width of the interior of the casing, a plurality of blocks within the casing each located at one of the slots and each having parallel front and rear faces lextending lengthwise of the casing and curved ends, flanges on the sides of the blocks to prevent escape of the blocks from the casing, a strip within the casing extending under all of the blocks, rollers within the casing contacting with the ends of the blocks, spacers within the casing located at the portions thereof lying between said slots, and means for moving the blocks and rollers lengthwise of the casing to cause the blocks to be projected through the slots in the casing; substantially as described.

7. A device for applying pressure, comprising a hollow frame-member slotted lengthwise thereof, a plurality of contacting devices arranged in line within the framemember, and means for moving said contacting devices lengthwise of the frame-member to cause certain of them to be projected through the slotted opening in the framemeinber, said means consisting of a reversely threaded screw lying within the frame-member, nuts movable within the frame-member and co-acting with the threads at the ends of the screw, and a portion intermediate the ends of the screw accessible from theJ eX- terior of the frame-member for turning the screw to cause movement of the nuts lengthwise of the frame-member; substantially as described.

In testimony whereof I aflix my signature.

l/VALTER S. DUVELIUS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of liatents,l Washington, ID. C. 

